Reflex Action Revision

1. Reflex action revision.
Key points.
•A receptor detects a stimulus –this can be
anything that causes a sense organ to activate.
•A sensory neurone transmits the electrical
impulse.
•At the junction between two neurones, the
synapse, chemical transmitters are released.

2. Reflex action revision.
Key points.
•A relay neurone passes the impulse on within the
CNS (this is often shaded grey).
•A motor neurone is then stimulated.
•This impulse is then sent to the effector, this can
be a muscle or a gland.
•Action is taken.